He took himself out of the running in a written statement just now:
Last week I communicated to Senator Obama and his presidential campaign my firm intention to remain in the United States Senate, where I believe I am best equipped to serve the people of Virginia and this country. Under no circumstances will I be a candidate for Vice President. . . . At this time I am also renewing my commitment to work hard to make sure that Senator Obama wins both Virginia and the presidency this November. He is a man who speaks eloquently about our national goals and calls for the practical solutions that must be put into place to obtain them. I will proudly campaign for him.